As the topic says this is about snorkeling (or however you spell it, can be spelled both ways I think). I've been snorkeling before but for oh I don't know... maybe 10-12 I haven't been doing it at all so I'm looking forward to getting back to it. Sadly I've lost/misplaced/borrowed others my old gear and am looking into getting some new stuff. Seeing as I've been away from it for so long and have seen tons of new products I was wondering if any of you do any diving/snorkeling and if so do you have any pointers concerning the gear?I've seen snorkels with top valves and bottom valves, some with both even and I can't quite make up my mind about what to get.Also if any of you have documentation about converting a small propane tank to an air tank I'd appreciate it. I've done it before but it's been too long for me to remember all the steps and the guides online are horrible at best.